I need to help a friend set up a public internet access point on his very low-tech home network. We've simply run a couple of CAT-5e cables down to the pier. One will be used as a hard port. The other will have a Wireless Access Point attached to it. Both return to a Linksys 4 port Router/Gateway.
The thing is, we want the two wires down to the pier to be segregated from the rest of the network, except for internet and email access. They will both be essentially unsecured so my friend needs to protect his internal assets.
There is no domain or server. Only a workgroup and simple hardware. Any ideas?